- Open application and Select UTM Tab
- Select Map Datum
- Specify the Zone Number
- Click on '...' Button if you want to refer to Datum number map
- Select the Hemisphere
- Enter Easting and Northing Values
- Click on Convert to Get Latitude and Longitude of the given point
- It is always better to convert latitude longitude with higher precision

- Select 'Lat / Long' Tab
- Select Map Datum
- Specify Latitude and Longitude
- Click on Convert to get respective UTM coordinates

- Select 'UTM' Tab
- Click ON Open Template and Program will open an Excel Sheet
- Enter Bulk (Multiple / Many) UTM coordinates with Hemisphere and Zone Details
- Save the File
- Select Excel File by Locating the file after clicking '...' Button
- Select the Map Datum
- Click on Convert
- The software will process bulk data at once and give the resulting Latitude and Longitude in Excel Sheet (Spread Sheet)

- Select 'Lat/Long' Tab
- Click on Open
- Click ON Open Template and Program will open an Excel Sheet
- Enter Bulk (Multiple / Many) Lat Long Values
- Save the File
- Select Excel File by Locating the file after clicking '...' Button
- Select the Map Datum
- Click on Convert
- The software will process bulk data at once and give the resulting UTM Coordinates in Excel Sheet (Spread Sheet)

Template for converting Lat/long to UTM

Template for converting UTM to Lat/long

Converting Latitude Longitude into Map Coordinate is not a single step conversion as in most of the conversion from one unit to another unit by applying simple formula. This white paper explains which are the factors to be understood for Latitude and Longitude Conversion.

- Cartesian coordinate system (CCS)
- Geographic Coordinate Systems
- Geographic Directions
- Latitude
- Meridian
- Prime Meridian
- Longitude
- Geodetic Height
- Ellipsoid
- Map
- Map Datum
- Map projection
- Universal Transverse Mercator coordinate system
- UTM Zone

Earth is not a Flat Surface. So Cartesian coordinate system cannot be used to represent Earth Surface as Earth has a Spherical Surface. When survey is done for less then 10 Kms, variation due to curvature of the earth will be insignificant and flat earth models can be used. But when maps represent bigger area, Curvature of Earth has to be considered and hence there is a need of geographical coordinate system.

South: Direction toward the South Pole. East: The direction parallel to the Equator and toward which the Earth's rotation is

West: The direction opposite to the Earth's rotation is West.

Latitude and Longitude are the angles measuring North to South and East to West.

The Equator and Prime Meridian are the reference planes used to define latitude and longitude.

Equator Since it is known form Ancient Greeks time that Earth is spherical object rather than a flat surface, to determine position on the Earth, reference points and circles are defined. Imaginary line passing through North Pole to South Pole is the Earth’s rotation axis. The circle perpendicular to this axis which is equidistant from the poles is known as Equator. Equator is the starting point for measuring latitude.

The Earth is divided equally into ±90° degrees of latitude and ±180° degrees of longitude.

1 Min = 1/60 of a Degree and 1 Sec = 1/60 of a Minute

A minute of arc corresponds to 1.86 Km. A second of arc corresponds to 31.0 m.

Decimal Degrees (DD): Latitude and Longitude geographic coordinates are represented as decimal fractions and are called Decimal Degrees.

10 Degree 12 Minute 14 Seconds is represented as 10o 12 ‘ 14 “ = 10 + 12 / 60 + 14 / 3600 = 10.20389

Earth has substantial variations in the elevation of its surface from point to point. The peak of Mt. Everest is 9 Km above sea level and The deepest point of the Marianna Trench is 11 Km below sea level.

If the surface of the earth has to be represented as a Map (2 – Dimension) then we need to project points into 2 dimensional Space and since earth is not a perfect spear (perfect round) Ellipsoid representation to be used for mathematical modeling. Map coordinates are usually shown in one of two ways, as geographical coordinates (ie latitude and longitude values, in degrees) or grid coordinates, (as easting and northing values, in metres).

Spherical models fail to model the actual shape of the earth. The slight flattening of the earth at the poles results in about a twenty kilometer difference at the poles between an average spherical radius and the measured polar radius of the earth. Ellipsoidal earth models are required for accurate range and bearing calculations over long distances.

Because there are different ways to fit the mathematical model to the surface of the Earth, there are many different datums used around the world today depending on Nation and Agencies. Cartography, surveying, navigation, and astronomy all make use of geodetic datums

Simple Datum Models(Flat-earth models) are used for plane surveying

Complex Datum models used for international applications which completely describe the size, shape, orientation, gravity field, and angular velocity of the earth.

It is essential to select proper datum to get better level of accuracy. The Global Positioning System uses an earth centered datum called the World Geodetic System 1984 or WGS 84. The WGS 84 is currently one of the most widely used datums around the world. The WGS-84 Geoid defines geoid heights for the entire earth.

Note: Coordinate values resulting from interpreting latitude, longitude, and height values based on one datum as though they were based in another datum can cause position errors in three dimensions of up to one kilometer.

Different datums are based on different mathematical models of the earth's shape and dimensions (ELLIPSOIDS) plus an additional factor of PROJECTION.

To view the Earth on a flat piece of paper or a computer screen, its curved surface must be projected. A projection is a process which uses the latitude and longitude which has already been ‘drawn’ on the surface of the Earth using a datum, to then be ‘drawn’ onto a map.

By definition, all map projections show a distorted representation of the Earth surface therefore different map projections exist in order to preserve some properties of the sphere-like body (ie. either area, shape, direction, bearing, distance and/or scale) at the expense of other properties.

The Universal Transverse Mercator (UTM) geographic coordinate system uses a 2-dimensional Cartesian coordinate system to give locations on the surface of the Earth. It is a horizontal position representation, i.e. it is used to identify locations on the Earth independently of vertical position, but differs from the traditional method of latitude and longitude in several respects.

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